Just changed mine for the 300 hour service.
3 drain plugs and two filters...easy!
Depending on the access to your fill plug you might have to rig up a funnel with some tubing.
Got a big galvanized wash tub to drain the L3130 into, over 12 gallons, you have a couple of plugs in the center and one on each side for the reduction gear housings on the axles.
Instead of a funnel I just used a pail pump that fits in and screws onto the spout of the oil bucket.
It's a relatively simple job which is made easier if you have a lift. Otherwise, a creeper on a smooth surface will do. If you're changing the front axle / hub fluid as well, it tends to drain down onto the rim and tire. I cut up a 2 liter soda bottle to divert the used oil into the drain pan.
Like everybody says - it is easy. Just make sure your container is big enough and drain all the drain plugs not just one.
I put a shower drain in an old galvanized pan and piped it to a 55 gal drum with flex couplings for draining. For refilling I set the 5 gal bucket high and use one of those rattle syphon hoses.
I made this for my dozer oil changes where I need to handle 25 gals but it works good for the tractor too.